Sideways rotors

Hobart · by **Hobart** » 2021-01-07 4:52 p.m.

I was looking through Facebook, and there as an early Schargel with a rotary valve mounted with the cap facing down and the linkage coming from the top.

Is there a practical reason more manufacturers don't do this? I'm not sure how difficult it is to manufacture, but I feel like it would be a good alternative to adding extra bends to the rotor tubing in certain cases.

Elow · 2021-01-07 4:54 p.m.

Pics would be helpful, but sounds like the same concept as an axial

Edit: Oh, i thought "with the cap facing down and the linkage coming from the top" meant actually facing down.

Burgerbob · by **Burgerbob** » 2021-01-07 5:05 p.m.

Germans like to do this-

https://www.trombonechat.com/viewtopic.php?f=13&t=18365

You are making the instrument wider, linkage may be harder to route as well. Not sure why I would choose this over the "normal" way, especially with modern larger valves.

Bonearzt · by **Bonearzt** » 2021-01-08 8:28 a.m.

[quote="Elow"]Pics would be helpful, but sounds like the same concept as an axial[/quote]

More like Hagmann

hornbuilder · by **hornbuilder** » 2021-01-08 12:19 p.m.

These are standard rotor valves. The valve ports are arranged in an "H" configuration.

UncleJenny · by **UncleJenny** » 2021-01-08 1:22 p.m.

To my knowledge in the beginning all Schagerl trombones had Hagmann valves. I had the opportunity to try one of their first bass trombones back in 2002/2003. Here’s a pic of it:

hornbuilder · 2021-01-10 1:54 p.m.

hornbuilder · by **hornbuilder** » 2021-01-10 1:56 p.m.

The trombone in question in the original post, as well.as those by Pfretzschner and ThroJa are rotor valves in an H configuration.

Bonearzt · by **Bonearzt** » 2021-01-10 2:44 p.m.

Interesting, but could be tough to work on!

tbonesullivan · by **tbonesullivan** » 2021-01-13 9:16 p.m.

Reminds me of the "Walzenvalve" German tubas which have the rotors directly below the paddles, instead of on the other side of the horn. I mean there's no real rule regarding which direction the rotor has to face.

MStarke · by **MStarke** » 2021-01-14 4:38 a.m.

I cannot judge if the valve configuration for the Pretzschner and Throja trombones (and maybe others that are similar) is more difficult for technicians to work on. I can only say that all that I have seen and played myself had very well functioning and quiet valves and valve linkages. Of course this is not only a question of the configuration, but simply the build quality.

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Sideways rotors